Hello alangunnsteel,
The CIR is what you will configure to set the allowed amount of traffic out from the routers. The CBS will allow you to override the CIR upto the limit specified.
To configure this you will go to QoS -> Bandwidth on the switch.
Enable Bandwidth control on the applicable ports and configure the appropriate settings.
Ingress Rate(in KBits): 20480
Egress CIR(in KBits): 20480
Egress CBS(in Bytes): 2621440(This is 20Mbps, increase as desired to allow bursting)
Hope this helps.
Thanks,
-john